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authorJohannes Weiner <hannes@cmpxchg.org>2012-05-29 15:06:26 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-29 16:22:20 -0700
commiteb6332a54542bcd3aedb121ecb247f172b8f3602 (patch)
tree58c2b39668bd0411e36f024e2e1f7b8e37b02260 /Documentation/cgroups
parent6f60b69d8cabbf7c0daf879cae4d09ac0776f4b4 (diff)
downloadlinux-eb6332a54542bcd3aedb121ecb247f172b8f3602.tar.gz
Documentation: memcg: future proof hierarchical statistics documentation
The hierarchical versions of per-memcg counters in memory.stat are all calculated the same way and are all named total_<counter>. Documenting the pattern is easier for maintenance than listing each counter twice. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Michal Hocko <mhocko@suse.cz> Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by: Ying Han <yinghan@google.com> Randy Dunlap <rdunlap@xenotime.net> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/cgroups')
-rw-r--r--Documentation/cgroups/memory.txt15
1 files changed, 4 insertions, 11 deletions
diff --git a/Documentation/cgroups/memory.txt b/Documentation/cgroups/memory.txt
index 9b1067afb22..e479007f1a7 100644
--- a/Documentation/cgroups/memory.txt
+++ b/Documentation/cgroups/memory.txt
@@ -430,17 +430,10 @@ hierarchical_memory_limit - # of bytes of memory limit with regard to hierarchy
hierarchical_memsw_limit - # of bytes of memory+swap limit with regard to
hierarchy under which memory cgroup is.
-total_cache - sum of all children's "cache"
-total_rss - sum of all children's "rss"
-total_mapped_file - sum of all children's "cache"
-total_pgpgin - sum of all children's "pgpgin"
-total_pgpgout - sum of all children's "pgpgout"
-total_swap - sum of all children's "swap"
-total_inactive_anon - sum of all children's "inactive_anon"
-total_active_anon - sum of all children's "active_anon"
-total_inactive_file - sum of all children's "inactive_file"
-total_active_file - sum of all children's "active_file"
-total_unevictable - sum of all children's "unevictable"
+total_<counter> - # hierarchical version of <counter>, which in
+ addition to the cgroup's own value includes the
+ sum of all hierarchical children's values of
+ <counter>, i.e. total_cache
# The following additional stats are dependent on CONFIG_DEBUG_VM.